Entertainment computing - ICEC 2020 19th IFIP TC 14 International Conference, ICEC 2020, Xi'an, China, November 10-13, 2020 : proceedings - Nunes, Nuno Jardim; Ma, Lizhuang; Wang, Meili; Correia, Nuno; Pan, Zhigeng (Information systems and applications, incl. internet/web, and HCI, 2020)